Besides the Union Room in certain Pokémon versions, the wireless adapter only supports up to five players. The wireless adapter is also used in Pokémon games to download special data via the Mystery Gift option at various Pokémon-related events. While all three still support the Game Boy Advance Game Link Cable (and must use a link cable to link with Ruby and Sapphire), up to thirty-nine wireless adapter-connected players can convene in a virtual in-game lobby called the 'Union Room' for battles and trades.

One of the wireless adapter's greatest uses is in Pokémon FireRed, LeafGreen, and Emerald. Or you can use the Game Link Cable to trade and battle with Pokémon Emerald, Pokémon Ruby and Sapphire, and Pokémon FireRed and LeafGreen.The Wireless Adapter plugged in to a Game Boy Player. Plus, using the Nintendo Game Boy Advance Wireless Adapter, you can trade and battle wire-free with other players. Completely new areas of Hoenn will be revealed in this startling extension of Pokémon Ruby and Sapphire. Seek out all 7 of the all-new Frontier Brain competitors to track down every symbol in the Battle Frontier.

Even hardened Pokémon Trainers will need to be at their battling best, as Pokémon Emerald packs some of the toughest battles you'll have ever experienced. Fortunately the power of Rayquaza - the sky - can help you. Take on the might of Teams Magma and Aqua in this latest pulsating Pokémon adventure! In Pokémon Emerald, protect the world of Hoenn from Groudon and Kyogre, the mysterious forces of ground and water that are seeking to take over.

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